Slab construction



Sept. 14, 193 7.

|h 'HIH D c. F.' DAVIS 2,092,752

SLAB CONSTRUCTION Filed May 4, 195e 2 sheets-sheet 1 A x l (M Ik): il:

Sept. 14, 1937. c. F. DAvls 2,092,752

` SLAB CONSTRUCTION i Filed May 4, 1956 2 Sheets-Sheet 2 INVENTOR BY CzAfA/f/-/// ATTORNEY.

Patented Sept. 14, 1937 UNITED STATES SLAB CONSTRUCTION Clarke F. Davis, Short Hills, N. J., assignor to American Cyanamid & Chemical Corporation, New York, N. Y., a. corporation of Delawarev Applicatin May 4, 1936, serial No. 77,687

Y 6 Claims.

The present application is related to my-copending application Serial No. 655,591.

The present invention relates to a deck construction using precast slabs. 'Ihe principal object of the invention is the provision of a oor or roof deck where the precast slabs constituting the deck are of a channeled type, which channel may be filled with any desired material.

Another object of the invention is to construct a deck as above, of precast slabs mated or joined together such as by tongues and grooves. It is particularly desirable to construct such slabs with metal edge members where the tongues and grooves are constituted by portions of these members. Where desired, they. may be further protected from below by fire-resisting material.

To this end, the invention contemplates a roof, floor or other deck of precast slabs preferably, 2 though not necessarily, carrying metal edge members, where the members on opposite edges of the slab are complementarily shaped. In some instances, these shapes may constitute tongues and grooves so that the adjacent edges of two slabs will, through the medium of the metal members, form spaced apart I beams.` Where desired, a channeled type of precast slab may be used, in which event it will be found desirable to fill the channel with cinders, cinder concrete, concrete, gypsum, sound or heat insulation material or the like. Where the lill is placed in the channel in a wet condition, it will be found desirable to first waterproof the face of the channel to prevent absorption of the moisture by the slab itself and also to provide a weep-hole through which any excess moisture either in the mix or accumulating in the channel as by rain or the like, may escape.

In some instances, it will be found desirable 40 to protect the metal membersfrom below from the ravages of fire by special insulating material. The invention further consists in the novel I arrangement, combination and construction of parts more fully shown and described in the ac- 45 companying drawings.

In the drawings: Fig. 1 is a plan view of the slab of this invention;

Fig. 2 is a partial plan view showing the manner of assembly of the slabs of Fig. 1 into a deck; Fig. 3 is a sectional view along the line 3-3 of Fig. 2 with a filling and floor finish in place;

Fig. 4 is a view similar to Fig. 3 showing a modified form of floor nish and with softs protecting the metal edging;

Fig. 5 is an enlarged sectional detail showing the manner of attachment of the soflits and Fig. 6 is a partial perspective view of the soft itself.

Referring now with particularity to the drawings, there is shown in Fig. 1 a precast slab hav `ing a body I of set cementitious material such ask gypsum or the like either with or without Wood chips or other lling material, cast so as to form a channel 5 therein.

Complementary metal edge members are provided on at least two opposite edges of the slab and these may consist of webs 2 and lower and upper flanges 3 and 4 respectively. As shown, the flanges 3' are completely embedded in the bodyy material I, while the flanges 4 lie substantially flush with one face of the slab. The end portions of both the flanges 3 and il are turned back into the slab as this makes for a sturdier construction;

It Will also be apparent that the webs 2 in the complementary members are provided with tongues and grooves so that when the two4 are placed together, one meshes or mates withv the other and forms a substantial' I beam.

Where desired, a reinforcing mesh 6 may be provided and it has been found to be particularly efficacious if the ends of vthis reinforcing mesh rest at one endon top of the groove and-at the other side, inside of the tongue as shown inFig. 5.

Similarly, complementary metal members may be provided on the short'edges'of the slab as well.

In erection, a deck may be formed as in Fig. 2 by placing together a series of the slabs shown in Fig. 1, it being preferable to stagger the joints' between slabs as this makes for a stronger construction.

In Fig. 3, a deck has been shown made of the slabs of Fig. 1 assembled in the manner of Fig. 2 where the channel 5 has been lled as at 49 with some material, such as dry cinders, cinder concrete, concrete, gypsum or any other filling material wet or dry which may or maynot have heat and sound insulating properties. Where concrete is used, a particularly strongv deck construction results due to the fact that in addition to the spaced apart I beams formed by the mated metal members, the set concrete forms spaced apart` beams.

Where a wet fill such as concrete or the like is used, it may be desirable before the same isA poured intothe channel to surface the inside of the channel with a waterproof coating such as asphaltum, paint, metal foil, or the like. 'Ihis coating is shown diagrammatically at 5I. It may also be desirable to provide a Weep-hole 52 at the bottom of the slabs so as to permit excess Water either incorporated inthe ll or which may collect in the channel from rain during the construction operation to escape.

Obviously any type of floor nish may be applied directly over the tops of the slabs and in` Fig. 3, this is shown at 50 to consist of an ordinary wood flooring while in Fig. the floor 53 is shown of concrete or other plastic material poured directly on top of the lill4 49. The use of an additional oor material materially assists in load distribution.

It Will be understood, of course,V that it is not necessary to apply a ll tothe channel 5 and in.

this event where a oor 5 0or 53jis applied to the slabs, the space of thechannel serves the purpose of insulation. Y

In order to protect the ilanges 3 of the metal members from theravages of re which might exist below such a deck, it may be desirable to provide special so-its of greater fire-resisting material such as asbestos, concrete or the like. vThese sots `are shown in Fig. 6 toconsist of a body material 54 into Which is embedded a member 55 adapted to be received between the webs 2 of the metal members. In Fig. 4, the part 55 is shown as terminatingshort of the Vtongue and groove, While in Fig. 5 the part 55 extends beyond and conforms .to the tongue and groove. In the former case, it may be desirable to apply nails 56 or the like to apertures 51 to assist in maintaining the soflt in place, although in the form shown in Fig. 5, this will not be necessary. In all cases, appropriate .areas of the adjoining slabs 1 Will be cut away inforder to accommodate the each. of said slabs having a longitudinal channel in its upper face, each channel being` faced with Waterproofing material, witha filling in the channel and a finish material overlying the slab and fill. i

2. A building construction comprising a series of contiguous precast slabs having mated edges, each of said slabs having a longitudinal channel in its upper face, and a fill in said channel in which the mating edges of the slabs are constituted by metal tongued and grooved members.

3. A building construction comprising a series of contiguous precast slabs having. mated edges, each of said slabs having alongitudinal .channel in its upper face, and a ll in said channel in which the mating edges of the slabs are constituted by metal tongued and grooved members with a soiiit beneath the mated metal members, the Abody of the soft being of greater re resistivity than the bodyv of the slab.

4. A building construction comp-rising a series of contiguous precast slabs having mated edges, each ofsaid slabs .having a longitudinal channel in its upper face, and-a ll in said channel in which the mating edges of the slabs are constituted; by metal' tongued and grooved members with a soit beneathl the mated metal members, the body .of the soliitV being of greater iire resistivity than the body of the slab, the bottom of said soiit being ushv With the bottom of the slabs. .Y

5. A building constructionY comprising a series of contiguous precast` slabs having mated edges, each of said slabs having a longitudinal channel in its upper face,` and a ll in saidr channel in which the mating edges of the slabs are constituted by metal tonguedand -grooved members with a soft vbeneath the mated metal members, the body of the soft being of greater re resistivity than the body of the. slab, and holding means carried by the soit extending into the joint between slabs. Y Y y' 6. A building construction'comprising 'a series of contiguous precast slabs having'mated edges,- each of said slabs having a longitudinal channel in its upper face, and a fill in saidV channel in Which the mating edges of the slabs are constitutedrby metal tongued and grooved members f with a soiit beneath'the "mated metal members,v

thebody ofthe soilt being of greater re resistivity than thebodyofthe slab, and holding means carried by'the soiiit and extending into the joint between slabs: and. conforming closelyto the tongue and groove ofthe slabs.

CLARKE if'. DAVIS. Y 

